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<a href="http://www.yiiframework.com">Yii Framework</a> v1.1.17 Class Reference
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<h1>CApplicationComponent</h1>
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<a href="index.html">All Packages</a>
| <a href="#properties">Properties</a>
| <a href="#methods">Methods</a>
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<table class="summaryTable docClass">
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<tr>
  <th>Package</th>
  <td><a href="index.html#system.base">system.base</a></td>
</tr>
<tr>
  <th>Inheritance</th>
  <td>abstract class CApplicationComponent &raquo;
<a href="CComponent.html">CComponent</a></td>
</tr>
<tr>
  <th>Implements</th>
  <td><a href="IApplicationComponent.html">IApplicationComponent</a></td>
</tr>
<tr>
  <th>Subclasses</th>
  <td><a href="CAssetManager.html">CAssetManager</a>, <a href="CAuthManager.html">CAuthManager</a>, <a href="CCache.html">CCache</a>, <a href="CClientScript.html">CClientScript</a>, <a href="CDbConnection.html">CDbConnection</a>, <a href="CDbFixtureManager.html">CDbFixtureManager</a>, <a href="CDbStatePersister.html">CDbStatePersister</a>, <a href="CDummyCache.html">CDummyCache</a>, <a href="CErrorHandler.html">CErrorHandler</a>, <a href="CFormatter.html">CFormatter</a>, <a href="CHttpRequest.html">CHttpRequest</a>, <a href="CHttpSession.html">CHttpSession</a>, <a href="CLogRouter.html">CLogRouter</a>, <a href="CMessageSource.html">CMessageSource</a>, <a href="CSecurityManager.html">CSecurityManager</a>, <a href="CStatePersister.html">CStatePersister</a>, <a href="CThemeManager.html">CThemeManager</a>, <a href="CUrlManager.html">CUrlManager</a>, <a href="CViewRenderer.html">CViewRenderer</a>, <a href="CWebUser.html">CWebUser</a>, <a href="CWidgetFactory.html">CWidgetFactory</a></td>
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<tr>
  <th>Since</th>
  <td>1.0</td>
</tr>
<tr>
  <th>Source Code</th>
  <td><a class="sourceLink" href="https://github.com/yiisoft/yii/blob/1.1.17/framework/base/CApplicationComponent.php">framework/base/CApplicationComponent.php</a></td>
</tr>
</table>

<div id="classDescription">
CApplicationComponent is the base class for application component classes.
<br/><br/>
CApplicationComponent implements the basic methods required by <a href="IApplicationComponent.html">IApplicationComponent</a>.
<br/><br/>
When developing an application component, try to put application component initialization code in
the <a href="CApplicationComponent.html#init">init()</a> method instead of the constructor. This has the advantage that
the application component can be customized through application configuration.</div>
<a name="properties"></a>

<div class="summary docProperty">
<h2>Public Properties</h2>

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<tr>
  <th>Property</th><th>Type</th><th>Description</th><th>Defined By</th>
</tr>
<tr id="behaviors">
  <td><a href="CApplicationComponent.html#behaviors-detail">behaviors</a></td>
  <td>array</td>
  <td>the behaviors that should be attached to this component.</td>
  <td>CApplicationComponent</td>
</tr>
<tr id="isInitialized">
  <td><a href="CApplicationComponent.html#isInitialized-detail">isInitialized</a></td>
  <td>boolean</td>
  <td>Checks if this application component has been initialized.</td>
  <td>CApplicationComponent</td>
</tr>
</table>
</div>
<a name="methods"></a>

<div class="summary docMethod">
<h2>Public Methods</h2>

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  <th>Method</th><th>Description</th><th>Defined By</th>
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<tr class="inherited" id="__call">
  <td><a href="CComponent.html#__call-detail">__call()</a></td>
  <td>Calls the named method which is not a class method.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="__get">
  <td><a href="CComponent.html#__get-detail">__get()</a></td>
  <td>Returns a property value, an event handler list or a behavior based on its name.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="__isset">
  <td><a href="CComponent.html#__isset-detail">__isset()</a></td>
  <td>Checks if a property value is null.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="__set">
  <td><a href="CComponent.html#__set-detail">__set()</a></td>
  <td>Sets value of a component property.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="__unset">
  <td><a href="CComponent.html#__unset-detail">__unset()</a></td>
  <td>Sets a component property to be null.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="asa">
  <td><a href="CComponent.html#asa-detail">asa()</a></td>
  <td>Returns the named behavior object.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="attachBehavior">
  <td><a href="CComponent.html#attachBehavior-detail">attachBehavior()</a></td>
  <td>Attaches a behavior to this component.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="attachBehaviors">
  <td><a href="CComponent.html#attachBehaviors-detail">attachBehaviors()</a></td>
  <td>Attaches a list of behaviors to the component.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="attachEventHandler">
  <td><a href="CComponent.html#attachEventHandler-detail">attachEventHandler()</a></td>
  <td>Attaches an event handler to an event.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="canGetProperty">
  <td><a href="CComponent.html#canGetProperty-detail">canGetProperty()</a></td>
  <td>Determines whether a property can be read.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="canSetProperty">
  <td><a href="CComponent.html#canSetProperty-detail">canSetProperty()</a></td>
  <td>Determines whether a property can be set.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="detachBehavior">
  <td><a href="CComponent.html#detachBehavior-detail">detachBehavior()</a></td>
  <td>Detaches a behavior from the component.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="detachBehaviors">
  <td><a href="CComponent.html#detachBehaviors-detail">detachBehaviors()</a></td>
  <td>Detaches all behaviors from the component.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="detachEventHandler">
  <td><a href="CComponent.html#detachEventHandler-detail">detachEventHandler()</a></td>
  <td>Detaches an existing event handler.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="disableBehavior">
  <td><a href="CComponent.html#disableBehavior-detail">disableBehavior()</a></td>
  <td>Disables an attached behavior.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="disableBehaviors">
  <td><a href="CComponent.html#disableBehaviors-detail">disableBehaviors()</a></td>
  <td>Disables all behaviors attached to this component.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="enableBehavior">
  <td><a href="CComponent.html#enableBehavior-detail">enableBehavior()</a></td>
  <td>Enables an attached behavior.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="enableBehaviors">
  <td><a href="CComponent.html#enableBehaviors-detail">enableBehaviors()</a></td>
  <td>Enables all behaviors attached to this component.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="evaluateExpression">
  <td><a href="CComponent.html#evaluateExpression-detail">evaluateExpression()</a></td>
  <td>Evaluates a PHP expression or callback under the context of this component.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="getEventHandlers">
  <td><a href="CComponent.html#getEventHandlers-detail">getEventHandlers()</a></td>
  <td>Returns the list of attached event handlers for an event.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr id="getIsInitialized">
  <td><a href="CApplicationComponent.html#getIsInitialized-detail">getIsInitialized()</a></td>
  <td>Checks if this application component has been initialized.</td>
  <td>CApplicationComponent</td>
</tr>
<tr class="inherited" id="hasEvent">
  <td><a href="CComponent.html#hasEvent-detail">hasEvent()</a></td>
  <td>Determines whether an event is defined.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="hasEventHandler">
  <td><a href="CComponent.html#hasEventHandler-detail">hasEventHandler()</a></td>
  <td>Checks whether the named event has attached handlers.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr class="inherited" id="hasProperty">
  <td><a href="CComponent.html#hasProperty-detail">hasProperty()</a></td>
  <td>Determines whether a property is defined.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
<tr id="init">
  <td><a href="CApplicationComponent.html#init-detail">init()</a></td>
  <td>Initializes the application component.</td>
  <td>CApplicationComponent</td>
</tr>
<tr class="inherited" id="raiseEvent">
  <td><a href="CComponent.html#raiseEvent-detail">raiseEvent()</a></td>
  <td>Raises an event.</td>
  <td><a href="CComponent.html">CComponent</a></td>
</tr>
</table>
</div>
<a name="events"></a>

<h2>Property Details</h2>
<div class="detailHeader" id="behaviors-detail">
behaviors<span class="detailHeaderTag">
property
</span>
</div>

<div class="signature">
public array <b>$behaviors</b>;</div>

<p>the behaviors that should be attached to this component.
The behaviors will be attached to the component when <a href="CApplicationComponent.html#init">init</a> is called.
Please refer to <a href="CModel.html#behaviors">CModel::behaviors</a> on how to specify the value of this property.</p>


<div class="detailHeader" id="isInitialized-detail">
isInitialized<span class="detailHeaderTag">
property
 <em>read-only</em> </span>
</div>

<div class="signature">
public boolean <a href="CApplicationComponent.html#getIsInitialized"><b>getIsInitialized</b></a>()</div>

<p>Checks if this application component has been initialized.</p>


<h2>Method Details</h2>

<div class="detailHeader" id="getIsInitialized-detail">
getIsInitialized()
<span class="detailHeaderTag">
method
</span>
</div>

<table class="summaryTable">
<tr><td colspan="3">
<div class="signature2">
public boolean <b>getIsInitialized</b>()</div>
</td></tr>
<tr>
  <td class="paramNameCol">{return}</td>
  <td class="paramTypeCol">boolean</td>
  <td class="paramDescCol">whether this application component has been initialized (ie, <a href="CApplicationComponent.html#init">init()</a> is invoked).</td>
</tr>
</table>

<div class="sourceCode">
<b>Source Code:</b> <a class="sourceLink" href="https://github.com/yiisoft/yii/blob/1.1.17/framework/base/CApplicationComponent.php#L53">framework/base/CApplicationComponent.php#53</a> (<b><a href="#" class="show">show</a></b>)
<div class="code"><code><span style="color: #000000">
<span style="color: #0000BB"></span><span style="color: #007700">public&nbsp;function&nbsp;</span><span style="color: #0000BB">getIsInitialized</span><span style="color: #007700">()<br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">$this</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">_initialized</span><span style="color: #007700">;<br />}</span>
</span>
</code></div>
</div>
<p>Checks if this application component has been initialized.</p>


<div class="detailHeader" id="init-detail">
init()
<span class="detailHeaderTag">
method
</span>
</div>

<table class="summaryTable">
<tr><td colspan="3">
<div class="signature2">
public void <b>init</b>()</div>
</td></tr>
</table>

<div class="sourceCode">
<b>Source Code:</b> <a class="sourceLink" href="https://github.com/yiisoft/yii/blob/1.1.17/framework/base/CApplicationComponent.php#L43">framework/base/CApplicationComponent.php#43</a> (<b><a href="#" class="show">show</a></b>)
<div class="code"><code><span style="color: #000000">
<span style="color: #0000BB"></span><span style="color: #007700">public&nbsp;function&nbsp;</span><span style="color: #0000BB">init</span><span style="color: #007700">()<br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$this</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">attachBehaviors</span><span style="color: #007700">(</span><span style="color: #0000BB">$this</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">behaviors</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$this</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">_initialized</span><span style="color: #007700">=</span><span style="color: #0000BB">true</span><span style="color: #007700">;<br />}</span>
</span>
</code></div>
</div>
<p>Initializes the application component.
This method is required by <a href="IApplicationComponent.html">IApplicationComponent</a> and is invoked by application.
If you override this method, make sure to call the parent implementation
so that the application component can be marked as initialized.</p>


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